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Profane geometry

hearthsinger·profane-geometry·profane_geometry/profane_geometry.kicad_pcb

Profane geometry PCB layout, top view — open source Microchip SAM board by hearthsinger

About the Profane geometry PCB

Profane geometry is an open source Microchip SAM PCB design by hearthsinger, published on GitHub under the Custom license license. It is a 4-layer board measuring 61 × 76.2 mm, with 131 components from 44 distinct parts.

Its main chip is the ATSAMD21G18A-AUT, from the Microchip SAM family. Other key parts include the LM1117-5, AP2112K-3.3, TL074, TL072 and MCP6002-xSN. By type, the board carries 71 resistors, 36 capacitors, 11 ICs, 5 diodes, 3 connectors and 3 inductors.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

Digitally controlled triangle-core VCO with 4 individual waveshapes, plus one mix output with per-wave attenuation

I'm making (attempting) a Eurorack Module.

It's gonna be an oscillator builder/mixer based on a digitally-controlled Triangle Core VCO I found in a research paper. It will be controlled by the atsamd21 or atsamd11 (depending on what I end up needing and what is in stock) family of MCUs and have firmware written in Rust!

Yes. I've only barely figured out the building blocks of some of this stuff, and my knowledge extends to pretty much exactly what I've built so far. There are almost certainly issues with it. The OSHW community is great though and people who publish the source/schematics for…

Main components on the Profane geometry

LM1117-5AP2112K-3.3TL074TL072MCP6002-xSNMCP4728ATSAMD21G18A-AUT

Profane geometry bill of materials (BOM)

131 components, 44 distinct parts.

QtyPartRefs
1
LM1117-5
U1
1
AP2112K-3.3
U2
5
TL074
U3, U4, U5, U6, U7
1
TL072
U8
1
MCP6002-xSN
U9
1
MCP4728
U10
1
ATSAMD21G18A-AUT
U11
1
MMBF4416A
Q1
2
Conn_02x08_Odd_Even
J1, J2
1
USB_B_Micro
J3
1
RESET_SW
SW1
1
PWR
D1
4
1N5819
D2, D3, D4, D5
3
FB
FB1, FB2, FB3
2
47uF
C1, C2
20
0.1uF
C3, C12, C13, C14, C15, C16, C17, C22 +12
4
1uF
C4, C6, C9, C32
1
47nF
C7
2
2.2nF
C8, C29
1
22pF
C10
Show 24 more
QtyPartRefs
1
4.7uF
C11
4
47pF
C18, C19, C20, C21
1
4.7nF
C28
1
330R
R1
23
10k
R2, R3, R4, R5, R7, R9, R11, R16 +15
1
5.6k
R6
6
1k
R8, R12, R18, R29, R32, R61
1
1M
R10
1
7.15k
R13
1
2.87k
R14
1
4.12k
R15
1
3.57k
R19
1
169k
R21
6
47k
R22, R26, R37, R42, R49, R54
1
49.9k
R23
3
240k
R24, R63, R66
5
22k
R27, R41, R46, R53, R58
1
8.25k
R28
5
30.1k
R30, R38, R44, R50, R56
3
100k
R33, R62, R65
4
2.2M
R36, R43, R48, R55
1
64.9k
R64
1
56k
R67
4
4.7k
R68, R69, R70, R71

Profane geometry design files

The KiCad project lives in the hearthsinger/profane-geometry repository on GitHub; these links point at the commit this page was built from.

Profane geometry: common questions

What microcontroller does the Profane geometry use?

The Profane geometry is built around the ATSAMD21G18A-AUT, from the Microchip SAM family.

How big is the Profane geometry PCB?

The Profane geometry measures 61 × 76.2 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Profane geometry?

131 components, from 44 distinct parts. The full bill of materials is listed on this page.

Where can I download the Profane geometry design files?

From the hearthsinger/profane-geometry repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Profane geometry design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Profane geometry without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Microchip SAM firmware against it before you order a PCB.

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